Marine engine exhaust manifold



March 10, 1942. E. I ElPr-:RT

` MARINE ENGINE EXHAUST MANIFOLD Filed MarchV 19, 1940 III...-

Patented Mar. 10, 1942 2,275,634 MARINE ENGINE EXHAUST MANIFOLD Edward Leipert, College Point, Long Island, N. Y.,

assigner to Mack Manufacturing Corporation,

Long Island City, N. Y., a corporation of Delaware Application March 19, 1940, Serial No. 324,741

1 Claim.

The present invention relates to exhaust manifolds for engines and embodies, more specifically,

In exhaust manifold designs in current use, it has been found that there is a marked tendency standing, the condensate collects and gravitates to one or two end ports and runs into the ders.

Inasmuch as this condensate is generally more than slightly acid because of the effect of the to the rusting that results on prolonged shut-downs, a condition results that is most undesirable.

In accordance with the present invention, it is vent substantial at any one point.

Another object of the invention is to provide a manifold wherein means is provided for preventing the condensate adjacent each port from running back into the cylinder.

Further objects of the invention will be apparent as it is described in connection with the accompanying drawing, wherein:

Fig. 1 is a view in front elevation, partly broken away and in section, on the line I-I of Fig. 2, showing an exhaust manifold constructed in accordance with the present invention.

Fig. 2 is a View in transverse section, taken on the line 2-2 of Fig. 1 and looking in the direction of the arrows.

Fig. 3 is a View in section, taken on the line `3-3 of Fig. 1 and looking in the direction of the arrows.

Fig. 4 is a View in section, taken on the line 4-4of Fig. 1 and looking in the direction of the arrows.

Referring to the above drawing, an exhaust manifold is shown generally at I0, being formed with a cooling jacket I I having an inlet and outlet I2 and I3, respectively.

The exhaust gases leave the manifold chamber I4 at I5 and enter the chamber through a plurality of exhaust ports I6. The manifold is provided with a Aplurality of holes I1 to receive through bolts to secure the manifold in position in accordance with current practice.

It will be observed that the bottom I8 of the exhaust chamber proper lies above the axis of the exhaust ports and that these ports communicate with depressions IS below the bottom I8 of the chamber I The ports I 5 are formed with upwardly sloping walls 20 and 2i, the walls 2l terminating in lips 22 to hold the condensate collecting in the pockets I9 and prevent it from owing through the ports into the cylinders.

inasmuch as the ports I 8 and pockets I 9 lie generally below the chamber I4, condensate will be prevented from fiowing along the chamber to collect in considerable quantities at one point and thus flow back into the cylinders.

By means of the foregoing structure, it will be seen that the condensate that is formed in the exhaust manifold will be prevented from reaching the cylinders and causing rust and corrosion thereof.

While the invention has been described with respect to the structure shown in the accompanying drawing, it is not to be limited save as dened by the appended claim.

I claim:

An exhaust manifold for an internal combustion engine comprising an elongated chamber open at at least one end thereof and having spaced portions cupped downwardly to form sump-like depressions below the bottom wall of said chamber and at spaced points along the length thereof to receive and retain condensate at localized points in the manifold, said manifold having a plurality of ports to receive exhaust gases from the engine, one such port being located at each depression with a portion thereof disposed below the bottom wall of the manifold chamber and having the top and bottom walls thereof sloping upwardly toward the axis of said chamber, and the bottom wall of each port terminating in a lip disposed adjacent to and extending above the bottom of the associated depression to dam up and prevent condensate from flowing backwardly through the port to the engine.

EDWARD LEIPERT. 

